New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1887-03-15
EXPERIMENTS WITH THh PHoyoPOEE.

UTfIizING NEWLY DISCOVERED ELECIKiCAL
lRCE-TEIEGEAPHING OVER Az OPEN CIRCUIT.
Tho latest important advance In electrical science has
been made by c. LanglonDayies. OF London, who has
succeeded In utilizing for Geographic purposes form Of
electric force which be separated altogether from
the ordinary electric current and which pass freely
through insulators impossible by currents. Among
other things iclegraphc messages DO transmitted
ami received through ordinary line wlrc while at tho
same time other tclcgraphic messages being tran
SHIFTED and received through tho same wire by
the ordinary tolcgrapho apparatus The In
strument which these results Is called
the phonoporc aud when used in connection with exist
Ing telegraph systems viii materially Increase thoir
working capacity II while investigating the Undue
ton noises caused in telephone wires, according 10 Tie
London Times that Mr Langdon- Davies made his i'm
portan discovery The TO the conclusion that the
effects ascribed to induction afforded evidence OF the
OF form OF electrical force which might be sepa
rated from and which could pass freely through
usulltors impossible by currents His conclusions were
usuaed by experiments, but II was not until short
time ago that phonOporc tclegraphy could 10 success
fully employed aud that the principle could DO utilized
upon an existing telegraph line which was at tho Same
time being worked by the ordinary instruments.
1t will certainly come surprise 10 many" says
The London Times to learn that the phonoporc InstS
ents have 10 conducting circuit through them but this
is nevertheless fact The phonopore gives uniner-
ruped passage electrical effects capable Of being asso
ciaed with sound although does not permit the passage
OF electric currents In exterior form the transmitter
appears to ordinary Morse key mounted on base
about inches high This base contains an instru-
incnt which somewhat resembles induction coil. The
mpuses generated In primary circuit OF improved
construction which Is wound, In place Of second
airy circuit phonoporc OF two wires insulated from
each other throughout their entire length and
at both ends each Of these wires being however
uccted at one end ONLY To the nue. Tue number O phon
opOrc impulses generated I'm the ransmtter second
ia reguned 10y the vibrations OF organ-reed placed IN
the Urinary circuit Another reed tuned TO the same
rate vibration Is placed as receiver nt the distant
station In front OF All electromagnetic aud the phohoporo
Impulses tho transmtercauso 1t to yibrate. new
form contact BREAKER operated by tho receiyerreed
completes local relay circuit when INC reed . sun bt
break. whenever the reed vbrates thereby setting IN
action any required instrument IN connection with any
practical test with the phonopore made on tel
cgraph line rnpning from London Bridge To fohestohe
Inc line being worked with the phonopore spontaneously
with he ordinary needle system wolhlhA on lne mo
the wire has four single needle nsIu' W. y, o r
Iridec Nutleld shOrncle and folkest"ne harnoI Two
simplex phonopore tcegAphs, one al LoHdoh bl1ge hhu
other al fnlkosone harDoI Neiy u.'.tv'. " .io
line each 10y n single piece OF wire Five experiments
were arranged by Mr. IAngdon Davies ana successfully
c,rriod ont: N A phonopore message was trans
United alone from fo!kestono 10 London' ana
there received, working a post once universal
relay and ordinary Morse ,ounder; (2 similar phono
ore message was transmitted aud received while an or
binary teegraphio message was travelling III tho same
lrccion between the same stations 90 phonopore
rs,nee WAS transmitted aud rccen ed whl0 an ordinary
telegraph message being transmitted In the opposite
eso Was transmitted ard received between the
terminal stations while an ordinary telegraph message
yn, being transmitted between two intermediate STA
lions aud 5 phOnOporc messages were freely exchanged
between the terminal points alter the line Ind been dis
nniuurd London ana FOkestOne anu the circuit abso
utely broken.
IN the entire satisfaction OF lamcr Clark, L. r. B.. and
: McGOwan, Director IN Chief OF leegraphs and Deputy
Postmaster General OF Australia, and Mr.. Clark has
uointed many advantages which the dupexng OF %
telegraph service by adding a simplex phonophore
possesses the ordinary duplex system now IN use
The cost construction and OF working is much less, aud
messages be carried either III the same or opposite
directious. Moreover n the line IA already working
either the duplex or dpleK the ordinary ysien, the
uLon op0re stl be added To II II mo wire were
being for nothing else. The phonopOrcs easily
WORKED ana the trials mentioned the Instrument WAS
worked at one station BY boy OF sixteen who had no ex
petience Win H.